 
<form action="test.php" method="post">
<input type="text" name="t1[0][]"/>

<input type="text" name="t1[1][]"/>

<input type="submit" value="okok"/>
</form>
<?php 
if(isset($_POST['t1'])){
	print_r($_POST['t1']);
	echo count($_POST['t1']);
}
?>